Ticket #4284 - Timeline: Don't cache empty items.

modules/boonex/timeline/classes/BxTimelineTemplate.php

@@ -1547,7 +1547,7 @@ class BxTimelineTemplate extends BxBaseModNotificationsTemplate
 
         $aBrowseParams['dynamic_mode'] = true;
         $aResult = $this->getData($aEvent, $aBrowseParams);
-        if(!empty($aResult) && isset($aResult['_cache']) && (bool)$aResult['_cache'] === false)
+        if(empty($aResult) || (isset($aResult['_cache']) && (bool)$aResult['_cache'] === false))
             return $aResult;
 
         $oCache->setData($sCacheKey, serialize($aResult), $iCacheLifetime);